The DellTM PERC (PowerEdgeTM RAID Controller) family of enterprise-class controllers is designed for enhanced performance, increased reliability and fault tolerance, and simplified management—providing a powerful, easy-to-manage way to create a robust infrastructure and help maximize server uptime. PERC H800 also offers the following for PowerVault MD1200 and MD1220 enclosures:

Increased Capacity and Scalability – up to 192 drives connected to one PERC H800
Increased Flexibility - connect both 2.5" (MD1220) and 3.5" (MD1200) enclosures to a single PERC H800